Year	2011 U.S. Dollars
1960-01-01	23608
1961-01-01	25384
1962-01-01	27038
1963-01-01	29036
1964-01-01	29952
1965-01-01	31705
1966-01-01	34160
1967-01-01	36162
1968-01-01	38548
1969-01-01	41195
1970-01-01	43182
1971-01-01	43953
1972-01-01	45693
1973-01-01	48266
1974-01-01	50141
1975-01-01	49056
1976-01-01	52025
1977-01-01	53194
1978-01-01	54735
1979-01-01	57359
1980-01-01	58481
1981-01-01	59023
1982-01-01	59146
1983-01-01	59645
1984-01-01	61573
1985-01-01	62702
1986-01-01	64055
1987-01-01	65949
1988-01-01	67985
1989-01-01	69812
1990-01-01	70128
1991-01-01	69895
1992-01-01	70950
1993-01-01	72534
1994-01-01	75441
1995-01-01	77779
1996-01-01	78261
1997-01-01	79278
1998-01-01	79471
1999-01-01	79532
2000-01-01	81107
2001-01-01	80999
2002-01-01	80005
2003-01-01	78664
2004-01-01	79759
2005-01-01	80122
2006-01-01	80327
2007-01-01	80764
2008-01-01	79629
2009-01-01	76438
2010-01-01	78606
2011-01-01	78813